Temperature sensing device and medical device

The utility model provides a temperature sensing device which comprises a constant current source circuit and a temperature sensing circuit connected with the constant current source circuit in series. The temperature sensing circuit comprises a thermistor, a reference resistor and an analog switch. The first end of the thermistor is connected with a current channel Y2 of the analog switch. The second end of the thermistor is connected with a current channel Y0 of the analog switch. The first end of the reference resistor is connected with the current channel Y2 of the analog switch. The second end of the reference resistor is connected with a current channel Y1 of the analog switch. The current signal output end of the constant current source circuit is connected with the analog switch. The utility model further provides a medical device. The temperature sensing device has the advantages that the analog switch is utilized for enabling a constant current source to drive the thermistor and the reference resistor in a time-sharing mode so that the requirement of a measuring circuit for the system supply voltage can be lowered, a power circuit is simplified, cost is reduced, and meanwhile the high measuring precision is ensured.